Thursday, August 18, 2016

Tick-borne Diseases Update

Reports of multiple tick-borne diseases to Maine CDC are indicating an increase in all tick-borne diseases. Physicians have already reported more anaplasmosis cases so far this year than all of last year, and babesiosis and Lyme numbers are steadily increasing as well. Providers should be aware of the risk and prevalence of these diseases and consider them in their diagnoses.
Anaplasmosis:
  • 228 cases reported to date in 2016, compared to 186 in all of 2015
  • 116 cases reported from the Mid Coast region (Knox 49, Lincoln 43, Sagadahoc 18 and Waldo six)
Babesiosis:
  • 49 cases have been reported to date in 2016, compared to 55 in all of 2015
  • 13 cases reported from York county, ten cases from Knox county
Lyme disease:
  • Lyme disease cases take several months to be entered and classified, so current numbers are not available at this time
Powassan:
  • No cases have been reported to date in 2016, compared to one in all of 2015
Co-infections: 
Because all of these diseases are carried by the same tick (Ixodes scapularis), a person may be infected with more than one disease.
  • To date, 11 co-infections have been reported: four co-infections with anaplasmosis and Lyme disease, two co-infections with babesiosis and Lyme disease and five co-infections with anaplasmosis and babesiosis.
  • In 2015, 22 co-infections were reported: ten co-infections of Lyme disease and anaplasmosis; eight co-infections of Lyme disease and babesiosis; one co-infection of anaplasmosis and babesiosis; one co-infection of Lyme disease, anaplasmosis and babesiosis; one co-infection of Lyme disease and ehrlichiosis; and one co-infection of babesiosis and ehrlichiosis.
Recommendations for Providers:
  • Consider tick-borne illnesses in your differential, particularly for individuals with “summer flu” symptoms
  • Submit samples for testing
  • Treat patients appropriately – recommendations for treatment are available from http://www.idsociety.org/uploadedfiles/idsa/guidelines-patient_care/pdf_library/lyme%20disease.pdf
  • Report cases. All tick-borne illnesses are reportable in Maine, including the erythema migrans rash which is confirmatory. All cases should be reported by phone to 1-800-821-5821 or by fax to 1-800-293-7534.
For more information:


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